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High-density oxygen-enriched graphene hydrogels for symmetric supercapacitors with ultrahigh gravimetric and volumetric performance

Materials ScienceHydrogelsSupercapacitorsGraphene NanomeshesEngineeringHybrid CapacitorSymmetric SupercapacitorsUltrahigh GravimetricGrapheneEnergy StorageVolumetric PerformanceSupercapacitorCarbon AerogelsChemistryElectrochemical Double Layer Capacitor